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Finding the Fourth Proportional to 221,771.70, 306,047.90 and 126,278.77

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Solution

The fourth proportional to 221,771.70, 306,047.90 and 126,278.77 is: 174,266.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,771.70 : 306,047.90 = 126,278.77 : x
  2. Step 2: Convert to fraction form
    221,771.70/306,047.90 = 126,278.77/x
  3. Step 3: Cross multiply
    221,771.70x = 306,047.90 × 126,278.77
  4. Step 4: Simplify right side
    221,771.70x = 38,647,352,373.08
  5. Step 5: Solve for x
    x = 38,647,352,373.08/221,771.70
  6. Step 6: Final answer
    x = 174,266.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.